Holder for thermionic valves and the like



July 9, 1935. R, w, PIPER 2,007,660

HOLDER Fi'OR THERMIONIC VALVE AND THE LIKE Filed March 1, 1953 ATTORNEY" Patented duly 9, 1935 PATN - HOLDER ron THERMIONIC VALVES AND THE LIKE Ralph William Piper, Uxbridge, England, assignor to Radio Corporation of America, a corporation of Delaware Application March 1, 1933, Serial No. 659,193 In Great Britain March 16, 1932 4 Claims.

This invention relates to holders for thermionic valves and the like and has for its object to provide an improved valve or like holder of the so-called anti-microphonic type. As is well known, difficulty is frequently experienced-with thermionic valves by reason of the liability of the electrodes of such valves to vibrate and alter more or less protected against vibration are generally termed anti-microphonic valve holders and among the known devices which have been employed in such valve holders are springs of wire -or metal strip, sponge and rubber bases and like shock absorbing devices. Anti-microphonic valve holders as at present known, however, offer practical disadvantages in construction or use; for example, springs tend to break ultimately under prolonged vibration, rubber perishes and loses its resiliency in time and.- is, moreover, liable to absorb moisture and may, therefore, introduce insulation difiiculties, while many of the anti-- microphonic devices hitherto proposed do not lend themselves to cheap and satisfactory assembly and construction.

The present invention has for its object to' provide an anti-mic'rophonic valve or like holder which shall be simple and robust in construction, easy to assemble, relatively cheap to manufacture and capable of giving long and satisfactory use. p

' According to this invention an anti-microphonic valve or like holder comprises a plurality of sockets or other devices adapted to receive and make connection with the pins or other terminal members of thevalve or the like, to be inserted therein, a carrier body in which said sockets or the like are mounted, a plurality of support members attached to said sockets or the like and projecting outwardly from said carrier body, a base member surrounding said carrier 7 body and having a plurality of apertures through which said, support members-are adapted to pass, and felt or like frictional and resilient material lining said apertures and surrounding the support' members therein.

The invention is illustrated in the drawing accompanying the specification, and inwhich Figure 1 is a sectional elevation of a valve holder in accordance with this invention and Figure 2 is a plan. a

Referring to the drawing, the valve .holder therein shown comprises aplurality of sockets I (Cl. l73328) (say five) which are positioned within a corresponding number of elongated openings I formed in a carrier body 2 made of insulating material. The sockets l are located inwell known manner so as to be appropriately positioned to receive the usual connection pins of a thermionic valve. The sockets are slit lengthwise for a portion of their length, the slits being on opposite ends of two mutually perpendicular diameters so that over a portion of their length the said sockets constitute springy divided tubes adapted to give good contact upon the appropriate valve pins. At right angles to each socket and near the bottom thereof there is fixed a support member 3, which projects radially outwards from the in sulating carrier body 2. Surrounding the carrier body 2 there is a base member 4 having apertures 5 through which the support members 3 pass. In each aperture 5 there is positioned a felt or like lining, bushing, or tube 6, the sup 'port members 3 thus passing through the central apertures in the felt bushings 6 so that the-whole carrier body 2 is carried by the support members 3 in the felt bushings B. Each of the sockets with its support member-31s a loose fit laterally in the elongated openings l' of the carrier body 2 so that the sockets can accommodate themselves to valves having slightly differently spaced pins while, owing to the saw cuts in said sockets, they can also accommodate themselves to valve pins of somewhat different diameters. In order to readily guide the valve pins into the sockets of the carrier body the latter is formed at the top witha circular -channel 2'; Preferably the base member 4 is formed in two parts, i. c. it is split on a horizontal plane along the line X-X of Figure 1. The two halves are held together in any convenient way, forexample, by set screws I. Connection flexes 8 are soldered to the ends of the support members 3 (these flexes are not shown in Figure 1), the other ends of these flexes being connected to connection tags 9 which are carried by the upper portion of the base member 4. The division of the base member 4 into two parts greatly facilitates assembly since it enables the carrier body with the sockets and support pins to be assembled as a unit, the felt packings or bushings to be slipped over the support pins, and the two halves of the base member simply clamped together in position about the felt bushings.

Having now par-tiularly described and ascere tained the nature of said invention and in what -manner the same is to be performed, what I claim is:

1, An anti-microphonlc valve-holder compris-- ing a pluralityof sockets adapted to receive and make connection with the terminal pin members of the valve to be inserted therein, a carrier body through which said conducting support members are adapted to pass, and felt bushings fitted within said apertures and surrounding the conductingsupport members passing therethrough.

2. An anti-microphonic valve-holder comprising a substantially cylindrical carrier body of insulating material, a plurality of cylindrical apertures formed in said body substantially parallel to the axis thereof, and adapted to receive a corresponding plurality of metal tubular valve pin sockets which are a loose lit in said apertures,

each of said sockets being secured to a metal rodlike support member projecting radially outwards through the cylindrical wall of the carrier body,

and an annular base member surrounding said carrier body and provided with a plurality of felt lined radially disposed apertures which are adapted to receive the projecting support members.

3. A thermionic tube holder comprising an insulating member provided with a plurality of vertically disposed elongated openings, a socket for gripping the terminal pins of a thermionic tube housed within each of said openings and spaced from the walls thereof, rigid conductors'extending radially and outwardly through the wall of the insulating member, the inner ends of said conductors being connected to the lower ends of the sockets, a base member surrounding and spaced from the insulating member and having radial apertures through which the rigid conductors are adapted to extend, and bushings of resilient material surrounding the conductors and fitted within the apertures of the base member.

4. A thermionic tube holder comprising an insulating member provided with a plurality of elongated tubular openings, a socket for gripping the terminal pins of a thermionic tube housed within each of said tubular openings and spaced from the walls thereof, rigid conductors extending outwardly through the wall of the insulating member in a direction perpendicular to the sockets and tubular openings, the inner ends of said conductors being connected to the lower ends of the sockets, a base member surrounding and spaced from the insulating member and having radial apertures through which the rigid conductors are adapted to extend, bushings of resilient material closely surrounding the rigid conductors and fitted within the apertures of the base member, a terminal connection mounted on said base member adjacent the outer ends of said rigid conductors, and flexible connectors extending between and joined to said terminal connections and said outer ends of the rigid conductors. 

